truncate body to the size specified with `content-length`
truncate body to the size specified with `content-length`

Conflicts:
	lib/handler/mruby.c

mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o,mingodad/h2o